I'm interested to know whether there are audio files tucked away somewhere for the "earcons" - the sounds that TalkBack makes for certain things, like links, page scrolling, etc. Are these available somewhere/somehow?
Talkback is open source, and the files available on Github: https://github.com/rmtheis/eyes-free
The audio files are included in the repository in .ogg format. Simply download the repository and extract all of the .ogg files to access the audio.